Installation manual

D-TUNE Installation Manual
5
5 LED functions
The two LEDs located on the D-Tune indicate the current state of D-TUNE and may be useful for
troubleshooting.
During the startup (after powering on) the LEDs blink as the unit goes through self-test procedures and
firmware booting. If, after connecting the power, LEDs do not show any activity, then probably there are
problems with the power supply.
If the LEDs blink in alternative pattern -- upper/lower/upper/lower/etc – then the bootblock is active and
no valid main firmware is detected. This can happen if, for instance, the preceding firmware update
procedure was aborted for some reason. The bootblock waits for the new firmware upload, see the
“Firmware update” section of this document.
During the normal functioning of D-TUNE (when a valid firmware is loaded and self-test and startup
procedures are finished, which takes about 2 seconds), the LED functions are:
Upper LED:
• Flashes for 50ms once in 6 seconds when D-TUNE is attached to power supply, but
is in “Power Off” (“sleep”) state. Flashes for 50ms once in 3 seconds when D-TUNE
is in “Power On” state. This activity can be overridden by other activities of the same
LED.
• Blinks fast when IR signal are detected. This can be used to see whether D-TUNE
receives any IR control packets or not. This does not mean that D-TUNE recognizes
any IR command.
Lower LED:
• Switches ON when a control packet is sent through the RS-232. Switched OFF when
a valid reply to the control packet is received back. Therefore, if this LED is ON for
a long time, probably there are problems with the Panel Connection (or Panel power
supply).
The upper LED has also another purpose – if the D-TUNE encounters an internal irrecoverable error, it
stops all activities and starts blinking the upper LED in series (series of blinks, then a longer delay, then
the series of blinks is repeated, so on).
6 Connections
6.1 A/V & Control connectors
• Composite video input
• S-Video input (4-pin mini DIN)
• “VGA”-connector Component (RGB+syncs, RGB with sync on green, or YPbPr) video
input
• Audio inputs/outputs (8pin mini DIN)
• RS-232 port for display control
• Logic input port (future)
• IR Output for IR control of devices without RS-232 control
• RGB/YPbPr Output (480i/p signal for display device)
• IR Input for direct connection of IR from remote photo receivers
• IR Sensor (Built in Photo Sensor)